Semiautomatic electric stock heater for bolt-heading machines



,. E F. R. LONG SEMIAUTOMATIG ELECTRIC STO CK HEATER FOR BOLT HEADING MACHINES Filed Au 5, 1921 4 Sheets-Sheet 1 //w/v 70R 1 Frederic/c R. Lon 9% Nov. 15, 1927. 1,649,412

F. R. LONG SEMIAUTOMATIC ELECTRIC STOCK HEATER FOR BdLT HEADING MACHINES Filed Aug. 5. 1921 4 Sheets-Sheet 2 //V VE N TOR. Freds rzick R Lan Nov. 15, 1927.

F. RILoNG SEMIAUTOMATIC ELECTRIC STOCK HEATER FOR BOLT READING MACHINES Filed Au. 5, 1921 4 Sheets-Sheet 3 nrroR/ylsx SEMIAUTOMATIC ELECTRIC STOCK HEATER FOR BOTH HEADING MKCHINES Filed Aug. 5; 921 4 Sheets-Sheet 4 wins/Wok;-

- Healer-Zak L0727 /J-M I flTTOR/VEY Patented Nov. 15, 1927.

UNlTED STATES PATENT OFFICE.

FREDERICK R. LONG, OF BERWICK, PENNSYLVANIA, ASSIGNOR TO. AMERICAN CAR AND FOUNDRY COMPANY, OF NEW YORK, N. Y'., A CORPORATION OF NEW JERSEY.

SEMIAUTOMATIC ELECTRIC STOCK HEATER FOR BOLT-READING MACHINES.

Application filed August 5, 1921. Serial No. 490,005.

In the drawings:

Fig. 1 is a front elevation of my device for heating the stock to be supplied to a bolt heading machine;

Fig. 2 is a. section taken on the line 22 of Fig. 1 showing a piece of the bolt stock in the heating position in the device;

Fig. 3 is a top plan view with part of the frame broken away in order to show some of the operating parts;

Fig. is a fragmentary section taken on the line H of Fig. 2 with one section of the device shown in the discharging position;

Fig. 5 is section taken on the line 22 of Fig. 1 with the device shown in position to discharge the heated portion of the stock and showing only one set of cams;-

Fig. 6 is a fragmentary sectional view showing the positions of the operating cams of one heating section at the instant the stock magazine is returned to normal position; and

Figs. 7 and 8 are sections of one of the cam wheels taken on the lines .7-7 and 88, respectively of Fig. 6.

It is the object of my invention to provide an improved device for heating the stock to be supplied to a bolt heading machine of the type comprising av means for electrically heating the stock and means for automatically discharging the heated stock to the heading machine and supplying fresh stock to the heater. It is also an object of my invention to provide a device comprising a plurality of such means adapted to be operated automatically in succession so as to insure a continuous supply of heated stock to the heading machine.

In the embodiment of my invention shown in the drawings, the device comprises a suitable supporting frame 1 having the side members 2 and 3 joined by a plurality of cross members 4 so as to make a rigid structure. While I have shown this frame as an integral casting, it may, of course, be constructed of suitable parts that may be cast, pressed or standard rolled shapes. Mounted upon brackets 5 attached to the sides 2 and 3 is the core 6 of a transformer. The laminations of the core 6 are held together by the angle bars 7 the angle bars 7 being held firmly against the core 6 by the bolts 8 which pass through'openings in the angle bars 7 and brackets 5 and thereby hold the core 6 in position on the brackets.

The core 6 is rectangular in shape and upon one side are mounted the primary coils 9, the number of the coils 9, the winding thereof and the manner in which they are connected being determined by the work to be performed by the machine and the source of electrical supply to which they are to be connected. Surrounding the primary coils 9, but spaced therefrom, are the secondary coils 10 comprising, as is usual in this type of transformer, spaced block electrodes 11 and 12 joined by the flexible conductor 13 composed of a plurality of strips of thin sheet copper that are welded to-the electrodes 11 and 12. Four of the secondary coils have been shown in the drawings but more or less coils may be uesd, it being understood that sufficient coils are provided to furnish stock at the desired temperature and in the proper quantities for the heading machine. To support the secondary coils 10 a bar 14, adjustably supported by the adjusting screws 15 pivot-ally connected to the bar by bolts 17 and engaging in openings in the brackets 16 attached to the side members 2 and 3, is connected to each electrode 11 by the clips 18 that are bolted to the electrodes 11 while each electrode 12 is connected to, but insulated from, a U-shaped supporting strap 19 that is secured tothe upper angle bars 7 by the front set of bolts 8. A bar 20 that rests upon the upper angle bars 7 is connected to, but insulated from, each secondary coil 10 and is held in position by the L- shaped straps 21 that are attached to the bar 20 at each end and have openings through which the bolts 8 pass.

Mounted in bosses in the sides 2 and 3 is a rod 22 upon which are journaled a plurality of feed or magazine levers 23,-there being a lever for each secondary coil 10. Each lever 23 has an L-shaped arm 24 provided with a roller 25 and a short arm 26 provided with a cylindrical opening in which is mounted a tubular magazine 27 having an opening 28 in its wall. The levers 23 are positioned on the rod 22 by the separators 23 and locking collars 23" so that each magazine 27 will direct the stock onto the upper surface of the corresponding electrode 11 whenit is in a substantially vertical position.

On a rod 29' mounted in bosses on the side members 2 and 3 are journaled the control levers 30, the levers being positioned on the rod in the same manner as are the levers 23, and having an L-shaped arm 31 provided with a roller 32 and an irregularly shaped arm 33 adapted to engage the stock piece when it is in position on the electrode 11. In each of the side members 2 and 3 are rows of bolt openings 34 that serve to adjustably position the spring retainer member 35 that is attached to the side members 2 and 3 by the bolts 36. In openings in the member 35 are placed the springs 37 confined between the ends of the openings andnuts 38 on the stock holders 39. The stock holders 39 have U-shaped portions 40 that fit about the magazines 27 at the openings 28 and engage stock pieces in the magazines when themagazines are rotated about the rod 22. The stock holders 39 also have collars 41 on their stems that limit the movement of the holders 39 under the influence of the springs 37 so that holders 39 will be disengaged from the stock pieces as the magazines 27 are brought to the position shown in Fig. 2.

J ournaled in brackets 42 attached to the side member 3 is a worm 43 driven by any suitable means as by the belt shown and serving, through the worm wheel 44 to drive a shaft 45 journaled in bosses in the side members 2 and 3. Secured to the shaft 45 to rotate therewith are the cam wheels 46 having the cams 47 and 48, the cam wheels 46 being positioned on the shaft 45 so that each cam 47 will engage a roller 25 and each cam 48 will engage a roller 32 'and so that there will be uniform intervals between the engagement of successive rollers 25 by the corresponding cams 47.

As the operation of all sections of my device is the same, a description of the operation of a single section will sufiice. Assuming the parts to be in the positions shown in Fig. 2 where the stock piece 49 is held by the lever arm 33 in engagement with the electrodes ll'and 12 so as to complete the circuit through the secondary coil 10 with the upper portion of the stock piece 49 projecting into the magazine 27 and the worm 43 to be driven at such a speed that an interval sufficient for a proper heatin of the stock piece will elapse during a complete rotation of a cam wheel 46. then rotation of the cam Wheel 46 will cause the cam 48 to engage the roller 32 operating the lever 30 to withdraw, the lever arm 33 frorr engagement with the stock piece 49 against the action of spring 50. When the arm 33 has been withdrawn :1. little distance from the stock piece the cam 47 will engage the roller 25 and operate the lever 23, against the action of spring 51, to rotate the magazine 27 about the rod 22. Rotation of the magazine 27 about the rod 22 will cause the stockpiece 49 to be moved from engagement with the electrode 12 and to be moved along the upper surface of the electrode 11 until it is moved from the surface of the electrode 11 whereupon the heated stock piece 49 will be guided by the guide 52 and chute 53 to the heading machine (not shown), the heated end of the stock piece always pointing in the same direction. As the magazine 27 moves the stock piece 49 on the electrode 11 the Ushaped portion 40 of the stock holder 39 is brought into engagement with a stock piece in the magazine 27 at the cut away portion 28 and thereafter the stock holder will be moved with the magazine 27 against the action of the spring 37 which is of sufficient strength to clamp the stock piece engaged by the holder 39 against the wall of the magazine 27 and prevent the discharge of any of the stock pieces from the magazine save the heated one. The cut away portion 28 of the magazine is of such length and the holes 34. so arranged that the stock holder 39 can be adjusted for stock pieces of different lengths.

As shown in Fig. 5, the cams 47 and 48 are designed to give levers 23 and 30 their extreme positions simultaneously and rotation of the cam wheel 46 thereafter permits the levers 23 and 30 to be retracted by their respective springs 51 and 50, the stock holder 39, under the influence of its spring 37 serving to retain the stock pieces in the magazine 27 until further retraction of the stock holder 39 is prevented by the engagement of the collar 41 with the spring retainer member 35 whereupon the stock pieces are released and move downwardly in the magazine until the lowermost stock piece engages the upper surface of the electrode 11. The magazine 27 is not at this time in the fully retracted position and when returned to the fully retracted position upon movement of the cams to the positions shown in Fig. 6, the lever 30 is still held away from the stock piece on the electrode. Further movement of the cam wheel permits the lever 30 to be retracted by the spring 50 so as to bring the lever 30 into contact with the stock piece and position the stock pieces with respect to the electrodes. The lever 30 is so pivoted with respect to the electrodes 11 and 12 that it tends to force the stock piece downwardly against the electrode 11, as it moves the stock across that electrode as well as to force the stock piece against the electrode 12.

What I claim is:

1. In an electric heater, spaced electrodes, automatic work feeding means adapted to remove the work from the electrodes and means preventing the feeding of the work until the work feeding means is returned to a predetermined position.

2. In an electric heater, spaced electrodes, a magazine for feeding work to said electrodes and removing work therefrom and means adapted to prevent feeding the work havingspacedea to said electrodes while the work is beingremoved from said electrodes. 3. In an electric heater, spaced stationary electrodes, means to feed work to said electrodes and means engaging the work to force the work into contact with said electrodes.

4. In an electric heater, spaced stationary electrodes, means to feed work to said electrodes and remove the work'therefrom and I feeding work to said electrodes and removing the work from said electrodes and means for retaining work in. the magazine. I

7. In an electricheatenspaced stationary electrodes, a magazine for feeding'workto said electrodes and removin the work from g said electrodes,.means for retaining work in the magazine and means engaging the" Work to force the work into contact with said electrodes. 8. Inanelectric heater, a secondary coil having spaced; stationary electrodes, a pivma azine to remove the work from the elec- 'tr es.

9. In an electric heater,- a secondary coil having spaced electrodes, a pivotally mounted magazine to feedwork to said electrodes, means to rotate said-magazine to remove the 40 work from said electrodes and means to prevent the feeding of work to said electrodes upon the o ration of said magazine. 10. In an electric heater, a secondary coil having spaced electrodes, a magazine to feed work to said electrodes, means to operate said magazine to'u'emove the work from said electrodes and means operated upon the operation of said magazine to revent the feedingof work to-said electro es until the magazine is *"returned to the feeding position. .j

p 11. 'an electric heatr,.-'a secondary coil havingsspaoed stationary electrodes a pivotallyjmounted magazine to fed work to said electrodes; alever adapted to operate said f ine" to remove the work from said eleces and a wheel adapted to operate thelever. I a

12. In an eleot'ric heater, a secondary coil v magazine to feed work to said:eleotrodes, a lever adapted to operate said to remove the work succession. otally mounted magazine to feed work tosaid electrodes and means to operate said.

from said electrodes, a lever adapted to force 1 the work into contact ith said electrodes and a cam wheel for operating said levers.

' 13. In an electric heater, a secondary coil having spaced electrodiii, a magazine to feed work to said electrodes, a lever adapted to operate said magazine to remove the work from said electrodes, a cam wheel adapted .to operate the lever and a. yielding means adapted to retain work in the maga- ,zine upon theoperation of'the magazine.

14. In an electric heater, a plurality of secondary coils having spaced stationary electrodes, a feeding means for each coil adapted to feed work to said electrodes and remove the work from, said electrodes and means to operatesaid feeding means autgmatically in succession.

15. In an electric heater, a plurality of heater sections, means feeding work to each .heater section independently of the other heater sections, and nieans operating. said feeding means automatically in succession and a common discharge for said heater sections. 5

p 16. In an electric heater, a plurality of heater sections, means feeding work to each heater section inde endently' of the other heater sections, an means operating said feeding means periodically automatically in tubular magazine for feeding work, to said "electrodes and means operating said magazine to remove the work from said electrodes.

19. In an electrioheategspaced electrodes, a vertically arranged pivotally mounted tubular magazine for feeding 'work to said electrodes, means 0 ratin to remove the work means operated upon the operation of said ma azine to prevent feeding ofthe work said magazine during the operation of' said magazine.

om said electrodes, and

' 20. In an'electric heater. spaced electrodes,

a' vertically arranged pivotally mounted tubular magazine for feeding work to said electrodes, means rotating said magazine on its support toremove the work from the electrodes, and'means engaging the work in said ma ine upon 0 ration of-said magazine an preventing -of the work until return 1 I themag'azine is to feeding position. whereof have hereunto set my mewm Ill 

